SONMEZ, FAHRI. “Effect of Nitrogenous Fertilizer on Grain Yield and Grain Protein Concentration in Winter Wheat”. Asian Journal of Chemistry 19, no. 3 (March 30, 2010): 2036–2044. Accessed July 7, 2024. https://asianpubs.org/index.php/ajchem/article/view/13777.